Dr. Murai Éva szerk.: Parasitologia Hungarica 22. (Budapest, 1989)
RESULTS The monogeneans collected in Hungary belong to the genera Dactyl ogyrus , Gyrodactylus and Diplozoon (Tables 1 and 2). Of them, on the fry D. vastator , D. extensus . D. achmerowi and G. sprostonae, while on two-year-old and older fish D. extensus , D. vastator , D. ach merowi , G. sprostonae and Diplozoon nipponicum occurred. On common carp fry examined in Syria only one monogenean, D. minutus , was found (Table 3). In addition to monogenean infections, in Hungary Chilodonella cyprini , Costia necatrix, Tri- chodina spp., Apiosoma spp. and Myxobolus dispar , while in Syria a Trichodina spp. and the copepodit larvae of Lernaea cyprini were demonstrated on the gills of the common carp examined . DISCUSSION An interesting feature of the investigations conducted in Hungary was that D. achmerowi , a recently introduced parasite, proved to be the most prevalent Dactyl ogyrus species. This parasite was detected on the gills of both the fry and the older carp. Another interesting finding is that neither D. anchoratus nor D. minutus was found in the fish farms examined in Hungary, though the latter species proved to be very common on Syrian common carp and infected nearly 100% of the common carp there. In Syria D. minutus is the first monogenean reported from fish. The Diplozoon sp. found on the common carp was tentatively identified with D. nipponicum Goto, 1891. The occurrence of this parasite in Hungary was already known, but it was identified for the first time during this research. S AMMAN A.: Monogenea-fajok előfordulása magyarországi és szíriai tógazdaságokból gyűjtött pontyok (Cyprinus carpio) kopoltyúján A szerző tógazdaságban tenyésztett pontyokról Magyarországon 5 ( Dactylogyrus achme rowi , D. extensus , D. vastator , Gyrodactylus sprostonae, Diplozoon nipponicum\ Szíriában 1 ( D. minutus ) monogenetikus-mételyfait mutatott ki. A D. minutus Kulwiec, 1927 Szíriából az első ismert monogenea halakról. Legend to the figures Fig. 1. Head-piece with the genitals of Dactylogyrus minutus (x 90) Fig. 2. Tail-piece with the anchors and hooks of Dactylogyrus minutus (x 90) (orig)
